Handle sigils in IEx help

Author: josevalim

lib/iex/lib/iex/introspection.ex

@@ -35,6 +35,15 @@ defmodule IEx.Introspection do
       {mod, fun, []} ->
         {mod, fun}
 
+      {maybe_sigil, [_, _]} ->
+        case Atom.to_string(maybe_sigil) do
+          "sigil_" <> _ ->
+            {:{}, [], [find_decompose_fun_arity(maybe_sigil, 2, context), maybe_sigil, 2]}
+
+          _ ->
+            call
+        end
+
       {fun, []} ->
         {find_decompose_fun(fun, context), fun}
 

lib/iex/test/iex/helpers_test.exs

@@ -382,6 +382,10 @@ defmodule IEx.HelpersTest do
       assert capture_io(fn -> h(def) end) =~ def_h
     end
 
+    test "prints sigil documentation" do
+      assert capture_io(fn -> h(~w//) end) =~ "Handles the sigil `~w` for list of words"
+    end
+
     test "prints __info__ documentation" do
       h_output_module = capture_io(fn -> h(Module.__info__()) end)
       assert capture_io(fn -> h(Module.UnlikelyTo.Exist.__info__()) end) == h_output_module